Monday, September 23, 2013

August 2013 Global Temperature Anomalies

August 2013 Global Temperature Anomalies

Headline: August 2013 Global land and ocean combined, 4th warmest on record
Headline: August 2013 Global ocean temperatures, tied for record warmest

The global data set has 134 years of data (1880-2013). Scroll down past the map for a summary of the global May 2013 climate data.

According to NOAA scientists, the globally-averaged temperature over land and ocean surfaces for August 2013 tied with 2005 as the fourth warmest August since record keeping began in 1880. It also marked the 35th consecutive August and 342nd consecutive month (more than 28 years) with a global temperature above the 20th century average. The last below-average August global temperature was August 1978 and the last below-average global temperature for any month was February 1985.

Most areas of the world experienced warmer-than-average monthly temperatures, including: New Zealand, Australia, northern South America, western North America, Europe, much of eastern Asia, and most of the global ocean regions. Far eastern China, part of northeastern South America, part of the Barents Sea, sections of the western Pacific Ocean, and part of the south central Indian Ocean  were record warm. Meanwhile, the southeastern United States, Far East Russia, northern South Africa, Paraguay, Bolivia, and the eastern equatorial Pacific Ocean were cooler than average. No regions of the globe were record cold.

Global temperature highlights: August
  • The combined average temperature over global land and ocean surfaces for August tied with 2005 as the fourth highest on record for August at 61.22°F (16.22°C), or 1.12°F (0.62°C), above the 20th century average of 60.1°F (15.6°C). The margin of error associated with this temperature is +/- 0.22°F (0.12°C).
  • The global land temperature was the 11th warmest August on record, at 1.39°F (0.77°C) above the 20th century average of 56.9°F (13.8°C). The margin of error is +/- 0.41°F (0.23°C).
  • Some national temperature highlights include:
    • South Korea reported its warmest average August temperature since national records began in 1973, at 4.0 F (2.2 C) above the 1981-2010 average.
    • New Zealand observed its warmest August since national records began in 1909, at 3.4°F (1.9°C) above the 1971-2000 monthly average.
    • Australia reported its second warmest nationally-averaged August temperature since records began in 1910, at 2.88°F (1.60°C) above the 1961-1990 average. With the exception of the southernmost island state of Tasmania, all states and territories had average temperatures that were among their 10 highest for August.
  • For the ocean, the August global sea surface temperature was 1.03°F (0.57°C) above the 20th century average of 61.4°F (16.4°C), tying with 1998, 2003, 2005, and 2009 as the record highest for August on record. The margin of error is +/- 0.09°F (0.05°C).
Neither El Niño nor La Niña conditions were present across the central and eastern equatorial Pacific Ocean during August, with sea surface temperatures below average in the eastern equatorial Pacific. According to NOAA's Climate Prediction Center, neutral conditions are favored through the Northern Hemisphere winter 2013/14.


Friday, September 13, 2013

August 2013 Statewide Temperature and Precipitation Rankings

August 2013 Climate Summary:

 Nebraska had near normal temperatures and near normal precipitation during  August 2013.  As has been the case all year there were contrasts across the lower 48 states.  The southeastern U.S. had below normal temperatures while the northwestern U.S. had above normal temperatures.  The precipitation rankings also exhibited extreme variability across the 48 states.  Note for example that Indiana had it 4th driest August on record, yet neighboring Kentucky had above normal precipitation.  Minnesota and Iowa had their 7th driest August precipitation on record yet nearby Kansas had its 8th wettest August and South Dakota had well above normal  precipitation in August 2013.

 Here is a summary from our partners NOAA; NCDC and HPRCC.

Climate Highlights — August 2013
  • The average temperature for the contiguous U.S. during August was 73.1°F, 1.0°F above the 20th century average — the 28th warmest such month on record.
  • The western U.S., particularly the Northwest, was warmer than average during August. Idaho had its second warmest August, with a monthly temperature of 69.4°F, 4.5°F above average. Wyoming tied its third warmest August, with a temperature of 67.8°F, 3.7°F above average.
  • Below-average temperatures stretched from the Central Plains, through the Ohio Valley, and along most of the Eastern Seaboard, but no state had August temperatures ranking among the ten coolest.
  • The nationally-averaged August precipitation total of 2.63 inches was 0.03 inch above average.
  • Both wet and dry extremes were experienced across the contiguous U.S. during August, resulting in a near-average national precipitation total for the month. California, Georgia, and Kansas each experienced a top ten wet August, while Illinois, Indiana, Iowa, and Minnesota each had a top ten dry month.
  • According to the September 3rd U.S. Drought Monitor report, 50.1 percent of the contiguous U.S experienced drought conditions, up 4.5 percent since the end of July. Drought conditions expanded into the Upper Midwest and Lower Mississippi River Valley, as well as Hawaii. Beneficial rainfall helped to improve, but not eliminate, drought conditions across the Central and Southern Plains.
  • On a local basis, the number of record warm daily highs and lows (about 1800) during August was slightly greater than the number of record cool daily highs and lows (about 1450).

Thursday, September 12, 2013

Two days of welcome rains on the Plains

After several weeks of clear skies, high humidity and extremely hot unseasonable temperatures, cooler Canadian air moved into the Plains on September 10-11, 2013.  This cold front moving into the area triggered widespread precipitation across the region.

The following two maps, centered on Nebraska, show the radar estimated precipitation
LNK = Lincoln; BBW = Broken Bow; LBF = North Platte;  SNY = Sidney

NOTE:  12Z = 1200GMT or 7am CDST
Map 1: 12Z September 10 - 12Z September 11, 2013 Radar Estimated Precipitation
Map 2: 12Z September 10 - 12Z September 11, 2013: Observed Precipitation
Map 3: 12Z September 11 - 12Z September 12, 2013  Radar Estimated Precipitation

Map1:  Radar estimates on the first map show 1-2 inches of precipitation in Lancaster County and Lincoln with as much as 2-4 inches of precipitation to the northeast of Lincoln.
Map 2:  The actual observed precipitation amounts on the 2nd map agree very well with the first map, the radar estimated precipitation.
Map 3:  Radar estimates on this 3rd map indicate that the bulk of the rainfall fell to the south of Lincoln, NE with a radar precipitation estimate for our immediate area of 0.5 to 1 inch.

The two day rainfall total for Lincoln, NE at the official municipal airport location was 1.16 inches of rain.
This brought the Year 2013 precipitation total to21.61 inches.which is 1.19 inches below the normal precipitation to date of 22.80 inches.

Thursday, September 5, 2013

Precipitation Update for the High Plains Region

Precipitation Update for the High Plains

The following maps show the percent of normal precipitation and departure from normal precipitation for the High Plains region for two time periods, the last 30 days and the last 60 days.  Summer precipitation is dominated by convective precipitation which produces "hit or miss" thunderstorms producing significant rainfall for some areas and completely bypassing other nearby areas.

The last 30 days (August 6 to September 4, 2013):
Lincoln, NE, as of September 4, 2013 has only received 0.45 inches of precipitation since August 6, 2013 (note the map below with the red area of 5%-25% of normal precipitation for Lincoln and Lancaster County). Yet, Omaha, NE, only 50 miles from Lincoln, has received 2.17 inches for the same period and is an area of light blue on the map with 50% to 75% of normal precipitation.  And, just to the north of Omaha in northeast Nebraska there is a region of 150% to 200% of normal precipitation.

The last 60 days (July 7 to September 4, 2013):
The contrast across the High Plains region is even more dramatic if we look at the last 60 days of precipitation. Areas of South Dakota, north central Nebraska and Kansas have received from 200% to 300% of normal precipitation. Yet, southeast Nebraska as noted on the 60 day map has received only 25%-50% of normal precipitation.  North Dakota has a region that has received 150% to 200% of normal precipitation and nearby within the same state there is an area that has only received 5% to 25% of normal precipitation.



Tuesday, September 3, 2013

August 2013, Lincoln, NE, Climate Summary

Headline:  August 2013 was warmer and drier than normal for Lincoln, NE.

August 2013 had slightly above normal temperatures and was the first month with above normal temperatures since February 2013.  August 2013 was the third month in a row with below normal precipitation.  The most dramatic feature of the month was the sudden change from cooler than normal temperatures to well above normal temperatures mid month.

The following graph shows the Lincoln, NE, August 2013 daily high and low temperatures compared to normal daily highs and lows.  NOTE:  August 2013 statistics are located below the graph.

Here are the Lincoln, NE, summary statistics for August2013.

August 2013 Temperature Statistics:
Average High Temperature 86.9 F (0.1 degrees ABOVE Normal)
Average Low Temperature 65.3 F (1.5 degrees
ABOVE Normal)
Mean Temperature 76.1 F (0.8 degrees
ABOVE Normal)
Note: Mean temperature = the average of all the highs and lows
Number of days ABOVE Normal = 14
Number of Days BELOW Normal = 16
Number of Days exactly Normal = 1

Number of Days 90F or higher = 11 days (1 days less than normal)
Number of Days 90F or higher January 1-August 31, 2013 =32 days (5 days less than normal)
Highest temperature 100 F on August 30 (hottest day of the year along with the 100 F on May 14)
Lowest temperature 52 F on August 18

Record warm low temperature of 75F on August 24, 2013.
This is the warmest overnight low temperature for the date since records began back in 1887.

August 2013 Precipitation Statistics:
Total precipitation 1.11 inches (2.38 inches BELOW Normal)
Heaviest precipitation 0.69 inches on August 1

Normal January 1 - August 31 precipitation = 21.56 inches
Total precipitation January 1-August 31, 2013 = 20.45 inches
January 1 - August 31 precipitation deficit = 1.11 inches

July 2013 Lincoln, NE, Climate Data

Lincoln's Heat Wave Data